<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        //请实现以下效果
        function add (a, b, c) {
            return a + b + c
        }
        // console.log(add.length);
        function curry(fn){
            let arr = []
            function addCurry(a){
                arr.push(a)
                if(arr.length === fn.length){
                    newArr=arr.concat()
                    arr=[]
                    return fn(...newArr)
                }else {
                    return addCurry
                }
            }
            return addCurry
        }
        const res = add(1, 2, 3) // 6
        console.log(res)
        let addCurry = curry(add)

        // console.log(addCurry);
        const res2 = addCurry(1)(2)(3) // 6

        console.log(res2);
    </script>
</body>

</html>